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[Chemical Knowledge]：The role of sodium sulfite: excellent food additive

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Sodium sulfite is a common food additive, which belongs to the category of antioxidants, disinfectants, bleaches and other uses. Its main function is to maintain the quality, taste and color of food through redox reaction, and it can also play an important role in sterilization, oxidation resistance and water purification. Below, we will introduce in detail the role of sodium sulfite in the food industry and the precautions for use.

1. the role of sodium sulfite:

1. fresh

sodium sulfite in food is often used to maintain food freshness. It can regulate the acidity of food, thereby inhibiting the growth of microorganisms. It can also control the activity of enzymes in food and reduce the exposure to oxygen, thereby extending the shelf life of food.

2. delicious

sodium sulfite can also make food taste better. When the free radicals in the food are suppressed, the nutrients in the food are maintained, so the taste is better and more flavorful.

3. bleaching

sodium sulfite can bleach the pigment in food, make the food color more white, more luster, to achieve the effect of beauty.

II. Advantages of sodium sulfite:

1. High safety

The use of sodium sulfite in the food industry has been tested by many parties, not only low cost, but also high safety. During use, it will not cause harm to the human body, nor will it affect the taste and nutritional value of the food.

2. Functional diversity

sodium sulfite in addition to the preservation of food, delicious and bleaching, it is also widely used in other industries, such as leather products, cosmetics, medicine and other fields, showing its diverse functions.

3. Affordable

sodium sulfite is a low-cost food additive, easy to use, and the amount of addition is small, so it is economical.

III. Notes for the use of sodium sulfite:

1. Should not be excessive use of

excessive amount of sodium sulfite, not only can not maintain food quality, but also cause harm. Therefore, the use of food additives should be as far as possible to comply with national standards.

2. Work should wear gloves

sodium sulfite for strong reducing substances, will cause damage to human skin. Therefore, when working should wear suitable protective gloves and other protective equipment.

3. Not applicable to all foods